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APS » Journals » Phys. Rev. Lett. » Volume 81 » Issue 14
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Phys. Rev. Lett. 81, 2982–2985 (1998)

Size Dependent Thermopower in Mesoscopic AuFe Wires

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C. Strunk, M. Henny, and C. Schönenberger
Institut für Physik, Universität Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

G. Neuttiens and C. Van Haesendonck
Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium

Received 11 March 1998; published in the issue dated 5 October 1998

See accompanying Physics Focus

We have combined electron heating experiments and noise thermometry to perform quantitative measurements of the thermopower in mesoscopic samples. This new measuring technique allows us to detect finite size effects in the thermopower of narrow AuFe wires with an Fe concentration ranging from 50 to 3000 ppm. The size effects emerge when reducing the width of the wires below ≃300nm and may be related to a spin-orbit induced magnetic anisotropy close to the wire surface.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.2982
DOI:
10.1103/PhysRevLett.81.2982
PACS:
72.15.Jf, 73.23.-b, 75.50.Lk
 
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